The 61-year-old looked relaxed and happy as she chatted to other members of the crowd ahead of the IBF Cruiserweight World Championship title fight between Yoan Pablo Hernandez and Firat Arslan.

It comes exactly one week since the sex change was exclusively revealed in the Sunday Mirror.

Twice-married father-of-three Maloney, who guided Lennox Lewis to World Heavyweight glory, said she was “overwhelmed” by the positive reaction to his decision to come out as a woman called Kellie.

As the story spread around the world, the manager and promoter received the backing of sporting figures and prominent people in the macho world of boxing.

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Retired boxing manager Kellie Maloney looks on before the IBF Cruiserweight World Championship title fight

She said: “These are the kind of guys you would never expect to be supportive. It makes me so proud and I just want to thank them all for the support.

“It just goes to show you how the world is changing for the better. Many other people in my position have been severely traumatised for years from what they’ve been through. I cannot thank the British public enough for their care and understanding.”

Her daughter Emma Young revealed yesterday how she feared that her beloved father was slowly dying as Frank Maloney's health deteriorated.

But despite begging the boxing legend to tell her what was wrong, he refused to reveal the real reason behind his poor health – the strain of keeping secret his desire to become a woman.

Speaking for the first time since his transformation was made public, 36-year-old Emma explained how Frank suffered a heart attack and crippling bouts of depression as his urge to change sex took a devastating toll on his wellbeing.

The married mother-of-two also told how she struggled to come to terms with the news and was urged by a counsellor that the only way she could accept him in his new guise of Kellie was to grieve for her father as though he was dead.

She said: “He was being torn apart by something which was causing him extreme pain.

"I pleaded with him to tell me what it was because I wanted to help. But all he said was that it was a personal issue.

“I thought he was ill and was dying. I feared I was going to lose him.

"It was constantly gnawing away at me but he wouldn’t tell anyone what was wrong.”

The former boxing promoter became a well known face in Britain after helping Lennox Lewis become World Heavyweight Champion.

Frank's last high-profile fighter he worked with was David Price two years ago.